Throttling device.



E. E. MQGAULEY.

THROTTLING DEVICE.

APPLICATION FILED DEC. 6, 19 12.

w 8 8 M U W ATTORNEYS COLUMBIA PLANOGRAPH c0.. WASHINGTON, I)v c.

E. E. MOGAULEY.

THROTTLING DEVIGE.

APPLICATION FILED DEC. 6, 1912.

Patented Aug. 26, 1913.

2 SHEETS -SHBET 2;

WITNESSES- INVENTOR Elmr E. Ma Cau/e BY W ATTORNEYS ELMER ELSWORTH MCCAULEY, OF TAFT, CALIFORNIA.

THROTTLING DEVICE.

Specification of Letters Patent.

Patented Aug. 26,1913.

Application filed December 6, 1912. Serial No. 735,242.

To all whom it may concern:

Be it known that I, ELMER E. MoOAULnY, a citizen of the United States, and a resident of Taft, in the county of Kern and State of California, have invented a new and Improved Throttling Device, of which the following is a full, clear, and exact description.

My invention relates to throttling devices and is designed to be applied to engines operating the pumps of oil wells. The primary object thereof is to provide a throttling device which will be automatically actuated in case the well becomes clogged by sand, causing the pumping mechanism therein to stop, or in case any of the parts con nected to the pumping mechanism should happen to break, to cause the controlling valve of the engine operating the pump to shut off the supply of motive agent thereto and stop the machinery immediately before further damage can result.

Reference is to be had to the accompanying drawings forming a part of this specification, in which the same characters of reference indicate the same parts in all the views.

Figure 1 is a side elevation of my invention; Fig. 2 is a similar view, showing some of the parts on an enlarged scale; Fig. 3 is a perspective view of a detail forming a part of the controlling mechanism for the throttle; and Fig. 4 is a sectional view on the line 44 of Fig. 2.

On the drawings, the prime mover, which may be in the form of a steam engine, is shown at 1 and drives a wheel 2 by means of a belt 3. This wheel 2 is mounted upon a shaft 4 connected to a beam or pitman 5, which operates the pump line 6, the latter extending into the well that is being worked. My throttling device controls the engine 1, so that in case the line 6 should break, the engine will be immediately stopped. The shaft 4 is mounted in bearings 7 and carries a crank 8 with a crank pin 9 operating a link 10. This link 10 has a slot 11 receiving the wrist pin 9, and it is pivotally connected at its upper end to the beam or pitman 5. This beam or pitman 5 is pivotally mounted at 12 on the top of a standard 13 which is braced by posts 14, and its opposite end extends into the derrick 15 which is built over the well above mentioned. This end has a hook 16 connected by a link 17 to a bar 18, and this bar 18 carries any suitable take-up device 19 for regulating the operative length of the rope or chain 6.

The engine 1 is provided with a throttle valve 20 on the outer end of the stem of which is a pulley wheel 21, the valve being operated by a rotary stem to open and close it. This pulley wheel is connected to a similar pulley wheel by means of a belt or endless cord or chain 22, the other pulley wheel being mounted upon a post 23 at the base of the derrick 15, and secured by braces 24 to one of the braces 14. The belt 22 is operated by a clamping bar 25 having plates at its opposite ends which are secured thereto by bolts, these bolts having nuts which are tightened to cause the plates to grip the cord 22 against the clamping bar and hold the cord in fixed relation thereto. This clamping bar is mounted upon a crank 26 in bearings 27 secured to the adjacent brace 14, and the outer end of this crank 26 is connected by a link 28 to a cord 29. This cord or chain 29 passes over pulleys 30 on the pitman 5 and connecting link 10, and is secured at its opposite end to an eyelet carried by a sliding rod 31. This sliding rod is mounted on the link 10 and moves in guides 32. At its lower end it is slotted, as shown at 33, and through this slot passes a screw 34, which limits its movement, this screw being secured to the link 10, as will be readily understood. The lower end of this sliding rod is bent over as shown at 35, and this bent-over end extends into the slot 11 and engages the wrist pin on the crank 8 on its top.

In operation, the engine drives the shaft 4 and the crank 8 lowers the left end of the pitman 5, drawing the plunger connected to the line 6 upward. When the crank is making its upstroke the weight of the mechanism connected to the line 6 will pull down on the pitman to cause the left end with the link 10 to rise. Hence, the rod 31 will always be in the position shown in Figs. 1 and 2, that is, the screw 34 will remain in the top of the guide slot 33 and there will be no tendency for the wrist pin 9 to push the sliding rod 31 upward with respect to the link 10.

In case the well should become filled with sand and hinder the free movement of the line 6, the right end of the pitman 5 could not sink whenever the crank begins its up stroke. As a result, whenever this happens on the cord 29. This will rotate the crank 26 clockwise, and through the clamping bar 25 the belt 22 will be moved. As a result, the throttle valve 20 will be closed and the motive agent for the engine 1 will be shut off. The machinery will now stop. The same result will follow in case the line 6 or anything connecting the same to the pitman 5 or the plunger in the well should break.

Obviously, the engine could be an air motor or a steam engine, or any other prime mover which is operated by a motive agent supply. Furthermore, While I have shown and described my invention as being applied to well-operating mechanism, it is by no means limited to such use, but may be employed in any relation where the stoppage of the engine is required in case of accident to the mechanism to be driven by the engine.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. In an improvement of the kind described, the combination of a power shaft, a crank carried thereby, means for rotating said power shaft, means connected to the said crank to be driven by the power shaft, and means actuated by the crank and controlled by the means to be driven by the power shaft to arrest the means for rotating the power shaft in case of accident to the mechanism driven by the power shaft.

2. In an improvement of the kind de scribed, the combination of a power shaft, a prime mover for revolving the same, a crank carried by said power shaft, mechanism driven by said crank, and means actuated by said crank and controlled by the driven mechanism to shut off or reduce the flow of motive agent to the prime mover in case of accident to the driven mechanism.

3. In an improvement of the kind de scribed, the combination of a prime mover having a valve to regulate the supply of motive agent thereto, a shaft revolved by said prime mover, mechanism driven by said shaft, a pulley for said valve, a belt passing over said pulley, and means actuated by the power shaft and controlled by the driven mechanism to actuate the valve to reduce or shut off the motive agent in case of accident to the driven mechanism.

I. In an improvement of the kind de scribed, the combination of a pit-man, a power shaft having a crank, a link having a slot receiving said crank connected to the pitman, a sliding rod mounted upon the connecting link having one end adjacent the slot in position to be engaged by the crank to be moved thereby, and controlling means crank connecting the same to the pitman, a

prime mover having a valve for regulating the supply of motive agent thereto for driving said shaft, a pulley for moving said valve, a belt for said pulley, a bar clamped to said belt and having a crank for turning the same to move the belt, a sliding rod carried upon the slotted connecting link and having one end adjacent the slot in position to be engaged by the crank pin, and means connecting said sliding rod to the crank of the bar, whereby, in case of accident to the drive mechanism, the crank of the power shaft will move the sliding rod to turn the crank of the bar and thus .move the belt and the valve to shut off or reduce the supply of motive agent to the prime mover.

(3. In an improvement of the kind described, the combination of a movable member, means for connecting said movable member to a load tending to move said memher in one direction, a source of power, a connection between said source and said member for moving the member in the opposite direction, and means operable by said connection for cutting off the power in case of accident.

7. In an improvement of the kind described, the combination of a movable member, means for connect-ing said member to a load, said load tending to move said member in one direction, a power shaft comprising a crank for moving said member in the opposite direction, and a connection for shutting off the power operated by the said c an]: in case of accident.

8. In an improvement of the kind described, the combination of a movable member, means for connecting the same to a load tending to move the same in one direction, a crank shaft, a slotted link connecting the crank shaft to said member to move the same in the opposite direction, and a movable member in position to be operated by the crank to shut off the power in case of accident.

In testimony whereof ,I have signed my name to this specification in the presence of two subscribing witnesses.

LEO HOMAN, 1

H. E. MYERS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

